Use x402 payments into your apps: fetch requirements, sign, and send transactions.
x402-java-client is an early-stage Java project in the AI payments / x402 ecosystem, focused on cryptocurrency, java, spring, spring-boot. It currently has 3 GitHub stars and 0 forks, and sits alongside related tools like x402-spring-boot-starter, x402-examples, x402-facilitator, x402-commons, sample-agentcore-cloudfront-x402-payments, x402-deploy.
Website • Quick start • Documentation • Examples • Twitter
The Mogami Java Client SDK makes it easy to bring x402 payments into your applications. With just a few lines of code, you can fetch requirements, sign payloads, and send transactions securely. It handles expiration, authorization, and signature logic behind the scenes, so you can focus on building features instead of managing payments.
Protect your APIs with pay-per-call logic using a single Spring Boot annotation.
Learn x402 through real-world demos of paywalled endpoints and instant payment flows.
Run your own payment gateway as a Docker image, or use ours online to verify and settle x402 transactions instantly.
Shared foundation for building x402-compatible systems
AWS payment demo of x402 using Bedrock AgentCore, Strands SDK, and CloudFront.
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